Hand mining-machine.



Patented May 23,1916.

2 SHEETSSHEET I.

N. PEDULLA.

HAND MINING MACHINE.

APPLICATION FILED SEPT. 24,191 5.

N. PEDULLA. HAND MINING MACHINE.

APPLICATION FILED SEPT-Z4, 1915.

1,184,205, Patented May23, 1916.

2 SHEETS-SHEET 2.

lmummmmmmnum THE COLUMBIA PLANOURAPH cm, WASHINGTON, D. c.

NICOLA PEDULLA, 0F MACDONALDTON, PENNSYLVANIA.

HAND MINING-MACHINE.

lowing is a full, clear, and exact specification.

. This invention relates to mining machines and especially to coal cutting machines adapted to be operated by hand.

One object of the invention is to provide a machine of this kind which is simple in construction, inexpensive to manufacture,

. and which may be easily operated by unskilled workmen.

Another object is to provide the machine with improved means for holding it in different positions for cutting at difierent levels. r

A further object of the invention is to construct the machine in such a way that most of its operating parts are interchangeable and may be quickly assembled and takenapart as occasion may require.

Other objects will appear as the description proceeds.

The invention will be first hereinafter described in connection with the accompanying drawings,-and then more specifically defined in the claims at the end of the description. j

' 'In'the accompanying drawings, wherein similar reference characters are used to designate the corresponding parts throughout the several views: Figure 1 is a broken plan view of a machine constructed substantially in accordance with the present invention. Fig. 2 is a longitudinal vertical section taken centrally through the machine. Fig. ,3 is an enlarged detailed section through the spacing sleeves and splined beveled pinion on one of the bit-carrying shafts, said shaft being also shown in engagement with one of the internally screwthreaded passages in one of the removable cross bars. Fig. 4 is a detailed section on the line. IVIV of Fig. 1, showing the wedge at the end of the removable cross bar through which the shafts are passed, and

the removable block for retaining the wedge and cross bar in place. Fig. 5, is a side elevation of the'coal cutting machine as it appears in operation for cutting at the floor 1evel,'and Fig. 6 is a similar view showing Specification of Letters Patent.

' Patented May 23, 1916.

Application filed September 24, 1915. Serial No. 52,388.

how the machine is supported for cutting above the floor level.

The operating parts of the machine are mounted upon a rectangular frame comprislng side members 1 connected by bottom cross pieces 2 and upper cross pieces 3. Pockets 4 are formed in the inner faces of the side pieces 1 to receive and support cross bars 5 having internally screw-threaded passages 6 to be operatively. engaged by threaded shafts 7. There are preferably two of these cross bars 5, one being arranged near each end of the frame. Each cross bar 5 is made in two sections, the division being made horizontally and midway through the screw-threaded passages 6 to permit quick adjustment and removal of the shafts 7 from said passages. The two sections 5 and 5", Fig. 4, are held together by screws 8, one of which is preferably placed between each pair of adjacent passages 6.

To hold the cross bars 5 firmly in position and prevent rattling, wedges 9 are placed at the ends of these bars in the pockets 4. The forward one of the bars 5 is held in place in its pockets 4 by blocks 10 secured by screws 11 to the upper edges of the side pieces 1 of the frame. These blocks also serve to hold the wedges 9 at the ends of the forward cross bar in place,.as best shown in Fig. 4. The other cross bar is retained in its pockets by a platform 12 which extends across the frame and preferably fits between the rear upper cross piece of the frame and the blocks 10. This platform is removably held in place by screws 13 and serves to retain the wedges 9 at the ends ofthe rear cross bar in place in the same manner as the blocks 10 retain the wedges at the ends of the forward cross bar. The lateral edges of the platform 12 are preferably provided with overhanging flanges 14 which fit .down over the outer edges of the side pieces 1 of the frame and rest upon longitudinal ledges 15 rigidly attached to orformed integral with said side pieces.

Any suitable number of shafts 7 may be employed, but seven is the preferred numher, as shown in Fig. 1. Each of these shafts engages screw-threaded passages 6 in the cross bars 5 and is provided with a longitudinal groove 16 by means of which a beveled pinion 17 is splined thereto. The beveled pinion 17 is positioned between the two cross bars 5 by a pair of sleeves or spacing collars 18, one of which is arranged at eachside of the pinions. The relative lengths of the sleeves 18' vary on'the different shafts, so :that the pinions 17 on the 7 seven shafts arearranged in an arc in a horizontal plane. 7 p r V The platform 12 has seven short vertical shafts 19 journaled therein and arranged in spaced relation and in 'an-arc to correspond with the'positions of the pinions 17 on the shafts 7. Each of the shafts 19 carries a beveled pinion 20 on its lower end below the platform 12 to me'shfwiththe pinions 17 on the corresponding one of the shafts 7. A gear 21 is carried by the upper end of each of the shafts 19 on the upper face of the platform 12, and all seven of these gears 21 mesh with a large gear. wheel 22 journaled on the platform 12 and provided. with a handle 23 for turning. the

same. I The gear wheel 22 is preferably made with a skeleton central portion but a heavy rim, so that it will act like a fly wheel, its momentum helping to carry it a'roundin operation.

Each of the shafts 7 carries a bit 2 1* on its forward .end. These bits have plug and- 26 of the bits will overlap one another, as

clearly illustrated in Fig. 1. 'It will be understood, of course, that the spacing of the shafts 7 apart is determined so as to-provide for this overlapping of the flared cutting ends of the bits. The shafts 7 are headed on their rear ends, as at 27 to form. stops against the rear one of the cross bars v5 for limiting the advance of said shafts. It will r be noted that the'heads 27' onalternate ones only of the shafts will come in contact with the rear cross bar 5, but this will be sufficient to stop the advance of all "the shafts; Of

course, alternate ones of the, shafts 7 may be lugs 28 swiveled to the side pieces 1, and.

stakes 29, Fig. 5, are passed through the per forations in said lugs and driven intothe floor of the mine chamber. fitted with set screws 30 for binding the stakes in the perforations so as toprevent;

vertical as well as lateral and longitudinal movement of the machine while inoperation.

Instead of thestakes 29, long rods 31 may be passed through the perforations in the lugs 28 and extend from the floor to theceiling The lugs 28 are of the mine chamber, thereby allowing for at a higher level, as shown in Fig. 6. The

I set screws 30 are used for clampingthe rods I '31 to support the machine at anyv desired the machine to be moved upward for cutting tary movement of these gears 21 is communicated through the-short shafts 19 to the beveled pinions 20 and by them to the-beveled pinions 17 splined on the shafts 7 In this way, all of the shafts 7 are turned in unison and owingto their threaded engagement with thepassages6 in the cross bars5, they will bel either advanced or retracted, according to the direction of rotation of the gear wheel 22, Whenadvanced, the bits 24 on the forward ends ofthe shafts 7 will out into the wall of coal, as illustratedin Figs-5 and 6. V 1

The overlapping of the flared cutting ends 26 ofthe bits 2 1 will producea continuous slot or groove in the coal instead of a series of detached round holes as would bethe casef if the cutting endsofthebits were spaced apart instead of overlapped. 'When slots or grooves have been cut; at the desired levels with the machine in one position, the stakes 29 or anchoring rods 31*are removed from the lugs 28 and the machine moved to one side by grasping the handles-32 shown in Figs. 5 and 6. Only two menare required to operate and 'move the machine. In operation, one man turns the large gear wheel 22 for actuating the -bits, while the other man removes the coal dust from theslot orgroove being cut so as to leave a 'clearipass'age for the entrance of the bits; I I

'Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United State's is: 1 '1. In a mining machine, the combination below said plate, of screw-threaded shafts fitted in said passages, bits carried by said r shafts, 'pinions splined on-the shafts,- vertical auxiliary'shafts equal in number to the 110 with a frame 'havinga' top plate and hori- 4 zontally extending screwathreaded passages screw-threaded shafts and journa'ledin the top plate, pinion s carriedby the'lower ends '7 V of'the auxiliary-shafts and meshing respectively withk the pinions splined-onflthe threaded 'shafts,- gears on the upper endsof the auxiliary shaftsabove the topplate, and e a horizontal gear wheel disposed above'the,

top plate and meshingwith all of said'gears" I for simultaneously actuating all ofthe bits.

2. Ina mining machine,"the combination with a frame having a top plate and horizontally extending screw-threaded passages, l

bits'carried by said shaftsa'mea ns for spacing-said pinions on the shafts whereby they are arranged in an arcuate line across the frame,v auxiliary shafts equal in number to the screw-threaded shafts, said auxiliary shafts being j ournaled in the top plate and also arranged in an arcuate line, pinions carried by the lower ends of the auxiliary shafts and meshing respectively With the pinions splined on the threaded shafts, gears on the upper ends of the auxiliary shafts above the top plate and a horizontal gear Wheel disposed above the top plate and meshing with all of said gears for simultaneously actuating all of the bits.

In testimony whereof I have signed my name to this specification.

' NICOLA PEDULLA.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents. Washington, D. C. 

